Members of the phyllosilicate group include which of the following?

The members of the phyllosilicate group are characterized by their layered structures, which are a result of the arrangement of silicon-oxygen tetrahedra and metal-oxygen octahedra. This unique structure facilitates a variety of physical properties, including perfect cleavage in one direction.

Kaolinite, muscovite, and chlorite all belong to the phyllosilicate group, making this choice accurate. Kaolinite is a clay mineral, muscovite is commonly known as mica and exhibits perfect cleavage, and chlorite is another layer silicate that contains both silica and metal ions in its structure.

In contrast, the other options contain minerals that are not part of the phyllosilicate group. For example, biotite and talc are indeed phyllosilicates, but barite is a sulfate mineral and does not share the layered structure typical of phyllosilicates. Staurolite and sphalerite are also not part of the phyllosilicate group, as they belong to different mineral families characterized by quartz and sulfide structures respectively. Wavellite, while a layered mineral, is less commonly associated with the typical phyllosilicates as it has a distinctive phosphate structure